North, F. J. (1925). The slates of Wales. Published by the Museum and the Press Board of the University of Wales.
Chicago (17e ed.) BronvermeldingNorth, F. J. The Slates of Wales. Cardiff: Published by the Museum and the Press Board of the University of Wales, 1925.
MLA (8e ed.) BronvermeldingNorth, F. J. The Slates of Wales. Published by the Museum and the Press Board of the University of Wales, 1925.
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